Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Subject: Re: [PATCH v6 3/4] kunit: Taint the kernel when KUnit tests are run
To:     Daniel Latypov <dlatypov@google.com>
Cc:     David Gow <davidgow@google.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Brendan Higgins <brendanhiggins@google.com>,
        "Guilherme G . Piccoli" <gpiccoli@igalia.com>,
        Sebastian Reichel <sre@kernel.org>,
        John Ogness <john.ogness@linutronix.de>,
        Joe Fradley <joefradley@google.com>,
        Luis Chamberlain <mcgrof@kernel.org>,
        Nathan Chancellor <nathan@kernel.org>,
        kunit-dev@googlegroups.com, linux-kselftest@vger.kernel.org,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
        Jani Nikula <jani.nikula@linux.intel.com>,
        Lucas De Marchi <lucas.demarchi@intel.com>,
        Aaron Tomlin <atomlin@redhat.com>,
        linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org,
        Michal Marek <michal.lkml@markovi.net>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Jonathan Corbet <corbet@lwn.net>, linux-kbuild@vger.kernel.org,
        Greg KH <gregkh@linuxfoundation.org>,
        Masahiro Yamada <masahiroy@kernel.org>,
        Kees Cook <keescook@chromium.org>,
        Shuah Khan <skhan@linuxfoundation.org>
References: <20220708044847.531566-1-davidgow@google.com>
 <20220708044847.531566-3-davidgow@google.com>
 <fc638852-ac9a-abab-8fdb-01b685cdec96@linuxfoundation.org>
 <CAGS_qxpODhSEs_sMm5Gu55EsYy-M9V98eLU-8O+xGMxncXmY4A@mail.gmail.com>
 <f25f96ce-1c9b-7e66-a5be-96d7cf2988cf@linuxfoundation.org>
From:   Shuah Khan <skhan@linuxfoundation.org>
Message-ID: <a00efaa8-71e0-c531-b6a4-e3d695ad628b@linuxfoundation.org>
Date:   Fri, 8 Jul 2022 15:24:41 -0600
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101
 Thunderbird/78.8.1
MIME-Version: 1.0
In-Reply-To: <f25f96ce-1c9b-7e66-a5be-96d7cf2988cf@linuxfoundation.org>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 7/8/22 3:22 PM, Shuah Khan wrote:
> On 7/8/22 3:00 PM, Daniel Latypov wrote:
>> On Fri, Jul 8, 2022 at 1:22 PM Shuah Khan <skhan@linuxfoundation.org> wrote:
>>>
>>> On 7/7/22 10:48 PM, David Gow wrote:
>>>> Make KUnit trigger the new TAINT_TEST taint when any KUnit test is run.
>>>> Due to KUnit tests not being intended to run on production systems, and
>>>> potentially causing problems (or security issues like leaking kernel
>>>> addresses), the kernel's state should not be considered safe for
>>>> production use after KUnit tests are run.
>>>>
>>>> This both marks KUnit modules as test modules using MODULE_INFO() and
>>>> manually taints the kernel when tests are run (which catches builtin
>>>> tests).
>>>>
>>>> Acked-by: Luis Chamberlain <mcgrof@kernel.org>
>>>> Tested-by: Daniel Latypov <dlatypov@google.com>
>>>> Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
>>>> Signed-off-by: David Gow <davidgow@google.com>
>>>> ---
>>>>
>>>> No changes since v5:
>>>> https://lore.kernel.org/linux-kselftest/20220702040959.3232874-3-davidgow@google.com/
>>>>
>>>> No changes since v4:
>>>> https://lore.kernel.org/linux-kselftest/20220701084744.3002019-3-davidgow@google.com/
>>>>
>>>
>>> David, Brendan, Andrew,
>>>
>>> Just confirming the status of these patches. I applied v4 1/3 and v4 3/4
>>> to linux-kselftest kunit for 5.20-rc1.
>>> I am seeing v5 and v6 now. Andrew applied v5 looks like. Would you like
>>> me to drop the two I applied? Do we have to refresh with v6?
>>
>> Just noting here that there'll be a merge conflict between this patch
>> (3/4) and some other patches lined up to go through the kunit tree:
>> https://patchwork.kernel.org/project/linux-kselftest/patch/20220625050838.1618469-2-davidgow@google.com/
>>
>> Not sure how we want to handle that.
>>
> 
> I can go drop the two patches and have Andrew carry the series through
> mm tree.
> 

Sorry spoke too soon. Yes there are others that might have conflicts as
Daniel pointed out:

https://patchwork.kernel.org/project/linux-kselftest/patch/20220625050838.1618469-2-davidgow@google.com/

thanks,
-- Shuah